Angular Pie Chart divides a circle into multiple slices that are proportional to their contribution towards the total sum. Pie Chart is also referred to as Circular Chart. Angular Doughnut Charts are similar to pie charts except for a hollow center. On clicking on each slice, it either explodes / implodes based on it's current state.
Annotation (index / data label) is a great feature to be used in case of Pie / Doughnut chart. Library automatically adjusts the position of index labels so that it can show more labels without overlapping.
Pie Chart is a circular chart divided into sectors, each sector is proportional to the quantity it represents.
Doughnut Chart is a circular chart with a hollow center.
Most commonly used features in Angular Pie & Doughnut Charts include startAngle, radius, innerRadius, exploded, indexLabel, etc.